Correlation Analysis
BERKSHIRE HATHAWAY Class B vs Occidental Petroleum Corporation
BRK.B vs OXY
-0.025
Near-zero inverse
When one moves up, the other tends to move down.
BERKSHIRE HATHAWAY Class B
↗BRK.B
Berkshire Hathaway is a holding company with a wide array of subsidiaries engaged in diverse activities. The firm's core business segment is insurance, run primarily through Geico, Berkshire Hathaway Reinsurance Group, and Berkshire Hathaway Primary Group. Berkshire has used the excess cash thrown off from its operations to acquire Burlington Northern Santa Fe (railroad), Berkshire Hathaway Energy (utilities and energy distributors), and the companies that make up its manufacturing, service, and retailing operations (which include Precision Castparts, Lubrizol, Clayton Homes, Marmon, and IMC/ISCAR). The conglomerate is unique in that it is run on a completely decentralized basis. Berkshire is expected to generate close to $375 billion in revenue in 2025.
Market cap 1T
Occidental Petroleum Corporation
↗OXY
Occidental Petroleum is an independent exploration and production company with operations in the United States, Latin America, and the Middle East. At the end of 2024, the company reported net proved reserves of 4.6 billion barrels of oil equivalent. Net production averaged 1.326 million barrels of oil equivalent per day in 2024 at a ratio of roughly 52% oil and natural gas liquids and 48% natural gas.
Market cap 62.4B · 10,412 employees
Time Series
Relative Performance
Who Moves First
BRK.B leads OXY by 6 days
BRK.B tends to move before OXY.
After testing 13 timing shifts, the strongest relationship was -0.042 (they moved in opposite directions).
Do They Crash Together?
Correlation by Market Regime
How these series behave when markets are rising, falling, or diverging. A correlation that holds in drawdowns is very different from one that only works in rallies.
Both Rising
+0.068
14 periods · Return correlation when both series rose
Both Falling
+0.318
9 periods · Return correlation when both series fell
Diverging
-0.724
12 periods · Return correlation when series moved apart
R-Squared
0.1%
Share of variance in one series explained by the other.
Trend Agreement
58.8%
How often both series moved in the same direction period-to-period.
Overlap Quality
1,254
Deep shared window — 1,254 usable pairs.
Significance
n.s.
95% CI: [-0.080, 0.031]
Scatter
XY Regression
Pipeline
Data quality details
Pipeline
Data quality details
Pipeline Summary
1,254 paired data points survived the daily window.
Raw input
1,254
1,254
Normalized
1,254
1,254
Prepared
1,254
1,254
Aligned
1,254
1,254
Invalid removed
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
0
A: 0 / B: 0
Series A
BERKSHIRE HATHAWAY Class B
BRK.B
Market cap 1T
Stock · 1,254 raw → 1,254 prepared
Series B
Occidental Petroleum Corporation
OXY
Market cap 62.4B · 10,412 employees
Stock · 1,254 raw → 1,254 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
3
Estimated crossover points between normalized spreads.
Slope
-0.0038
Linear regression slope.
Intercept
52.9369
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
BRK.B
BERKSHIRE HATHAWAY Class B
Highest
+0.968
Republic Services Inc.
RSG · 1,254 data points
Lowest
-0.918
United Parcel Service, Inc. Class B
UPS · 1,254 data points
OXY
Occidental Petroleum Corporation
Highest
+0.593
Exxon Mobil Corporation
XOM · 1,254 data points
Lowest
-0.478
Amazon.Com Inc
AMZN · 1,254 data points
Saved 7 hours ago · ID: stock-brk-b-vs-stock-oxy-daily